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402_McCullough

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ID = 15359
       
Country:
United States of America (USA)
Brand: Common type USA tube/semicond.
Developer: McCullough, Frederick, S. Co.; Wilkinsburg, later Sales Company; Pittsburg 
Tube type:  Triode, vacuum   Text 
  Ca. 1925 up to 1945 rare.
Identical to 402_McCullough
Similar Tubes
Other characteristic (electr. data):
  R20_Rogers
Heater different:
  403_McCullough
Base UX-Base (4 Pins (2 thick, USA 1924, UX) (Codex=Bo) 2 Top contacts.
Was used by Radio/TV-reception etc.
Filament Vf 3 Volts / If 1.5 Ampere / Indirect / Specified voltage AC/DC
Description

This tube was designed by Kellogg for McCullough and was a detector-amplifier. It is a rare tube and was replaced by the 403. There is no known record of any receiver using the tube.

 
Information source Tube Lore (I)   p. 33
-- Collector info (Sammler)   
Babani, International Radio Tube Encyclopaedia
Taschenbuch zum Röhren-Codex 1948/49
402_a_c_pins.png 402_McCullough: Fin Stewart
Fin Stewart

Just Qvigstad 		402averagechar.png
402_McCullough: own collection
Peter den Boer
 
kellogg_402_tube_bm.jpg

 
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